Locking attachment for incandescent electric lamps.



A. F. W. MEYER. LOOKING ATTAGHMENT FOR INCANDESOENT ELECTRIC LAMPS.

APPLICATION rum) HAY 11. 1908.

991,872. Patented May 9, 1911.

fiw /mA -1 mm UNITED STATES PATENT OFFICE.-

ALIBER'I F. W. MEYER, OF CHICAGO, ILLINOIS, ASSIGNOR T0 JAMES H. MOGILL, OF VALPARAISO, INDIANA.

LOOKING ATTACHMENT FOR INCANDESCENT ELECTRIC LAMPS.

Specification of Letters Patent.

Application filed May 11, 1908.

Patented May 9, 1911.

Serial No. 432,311.

To all whom it may concern:

Be it known that I, ALBERT F. W. MEYER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Looking Attachments for Incandescent Electric Lamps, of which the following is a specification.

My invention relates to locking attachments for electric incandescent lamps, and has for its salient object to provide a locking device for attachment to an electric lamp socket applicable thereto in combination with means for preventing removal of the lamp from its socket, or for the connection of-other parts such as shades and the like with the socket.

In the drawings I have shown several embodiments of my invention, and in said drawings; Figure 1 is a side elevation of a locking lamp guard in closed position; Fig. 2 is a similar View of the guard in open position; Figs. 3 and 4 are detail views in central section and an end elevation of the lock, and; Fig. 5 is a detail of the parts thereof in disassociated relation; Fig. 6 is an enlarged View illustrating the construction of the guard frame, and; Fig. 7 is a sectional detail on line 7-7 of Fig. 6.

Throu hout the several views like numerals of reference refer always to like parts.

In the embodiment of my invention shown I provide a split clamp, adapted to be opened to permit the insertion of a part to be clamped and then closed to grip upon or about said part to be clamped, such clamp carrying on opposite sides of the split or juncture interengaging parts of a lock, said lock consisting of a bolt or screw permanently mounted on one of the ends of the split clamp, and a screw receiving member on the opposite end of the split clamp, said screw or bolt having a head shaped to require the application thereto of a socket key, and being surrounded by a protecting member, which necessitates the employment of a key of particular design for the operation of the look.

In the particular application of my invention, I provide a socket engaging clam 15 made up of two similar sections 16, 16 each of said elements being practically semicircular, each provided upon each end with one member of a locking device, generally indicated at 17. Each such lock comprises a male member carried by one of the split sections, and a female member carried by the other, the preferred construction which I employ being that shown in Figs. 3, 4.,

and 5.

In the particular construction shown, each end of each clamp section is shaped to provide a round plate, as indicated at 18 and 18, disposed on a radial line so that when the two clamping sections are drawn together the plates lie face to face, one of the coacting plates being provided with a screw receiving part, such as a drawn socket 19 the interior of which is screw threaded and the opposite plate carrying the positive member of the lock, which consists of a bolt 20 screw-threaded at one end, provided with a flange 21 between its ends and at its other end formed into a head 92, preferably of triangular shape to receive a socketed key.

The screw 20 is inserted through a hole 23 in the plate 18, so that the flange bears upon the surface of said plate, and the cap member 24 constituting a retaining device for the bolt, and a shield or guard for the head thereof is applied to the plate 18. As best shown in Fig. 4 such part 24 consists of a circular base 25, provided with projecting studs 26 bent down, as shown in Fig. 3, over the edges of the plate 18, to secure the parts together, said base .25 being drawn to provide a recess 27 to receive the flange of the locking bolt and to provide further a rim or guard 28 surrounding and projecting beyond the head 22 of the locking bolt. Thus to operate the lock a key must be provided which can pass into the opening of the guard 28 and engage the triangular head 22 of the bolt, the bolt being freely rotatable in the chamber provided by the plate 18 and the recess 27 in the cap 24.

' of the guard frame. The bead 29 in tilt? In the locking lamp-guard, as shown in Fig. 1, the clamp 15 is provided through its circular extent with a bead 29 for engaging a part of a lam socket and also givin strength to the 0 amp constructlon, and 1s further provided at its lower edge with an expanded petticoat 30, forming 1 apart igs. 1 and 2 is outwardly curved to coact with the bead usuall provided upon a metallic socket for an e ectric lamp, but where the guard is intended to coact with a socket provided with an annular recess, as s common in porcelain sockets, the bead is bent inwardly as shown at 29 in Fig. 8.

The cage or frame of the guard is constructed of vertically extending wires secured at the bottom to a common retainer and at their top to the petticoat 30 of the clamp, such wires 32 being all bent or bowed to convenient shape to receive the lamp bulb, and at their lower ends converging toward a common center on radial lines, and each sha ly bent downward so as to form a depen ing tip, as shown at 33 in I i 7. The retainer for the bottom ends of t e wire is preferably constructed of a plate 34:, havlng therein an annular groove or channel 35 for the reception of al of the tips 33 of the wires 32, the plate 34; having at its rim a number of separated fingers 36 between which the wires enter the groove or channel 35. When the wires are all assembled in the part 34 a plate 37 is laid over the radial wires and secured in position by bending the fingers 36 down over the edge thereof, as best indicated in Fig. 6. By this arrangement the wires 32 are all firmly connected together and to the retainer, but yet have a certain freedom of movement which enables them to pivot to a degree to permit the lamp uard to open, as shown in Fig. 2, on the ine of separation-of the two halves of the clamp, the different wires being displaced in the retainer to such degree as is necessary to permit the hinging movement. If desired a hook, 39, may be attached to the retainer, so that the lamp guard may be hung up.

For strengthening the cage or frame construction, I provide two semi-circular frame pieces 40 preferably in the form of a fiat ring-section, engaglng all of the wires 32 at about the point where the frame or cage is of reatest diameter. To this end all of the wires 32 constituting each section of the lamp guard pass through convenient holes in the corresponding ring section 40, and are kinked as at 32 at the point of juncture with such ring section, so that the strengthening members 40 may not escape from the positions in which they are placed. In the commercial manufacture of such guard the entire guard is' preferably after the parts are assembled, so

es ate that the parts on which "no particular straintfi i of movements are imposed are united by the tinning, which, however, does not suificiently secure together the parts of the lock or the parts of the retainer structure to prevent either the movement of the locking bolt or the hinging movements of the guard sections.

In applying the locking lamp guard in use, it is opened as shown in Fig. 2, placed around the lamp, as indicated in dotted lines in Fig. 1 the parts of each lock being brought together; and then. each lock is screwed u tight, so that the clamp 15 closely engages tlib socket and may not be detached therefrom without unscrewin the locking members and the lamp obviou y may not be remoged on account of the presence of the uar It will be understood that the specific embodiment of In invention herein given is susceptible of c ange to meet varying conditions of practice, and that I do not therefore desire to be understood as limiting the invention to such s ecific showing herein iven for purposes 0 clearness of dlsclosure urther than is defined in the appended claims.

What I claim and desire to secure by Letters Patent of the United States, is:

1. In a lamp locking device, a socket engaging clam and locking means therefor comprising uplicate plates, an interiorly threaded screw-receiving socket upon one of said plates, opening toward the opposing plate, a cap secured to said opposing plate, said cap being of shape to rovide a recess between itself and the coactlng plate, a bolt,

screw-threaded at one end and formed for reception of a suitable ke at the other, and a flange on the screwolt between said screw-threaded and key portions thereof for engagement in the recess between the plate and cap.

2. In a lamp-locking device, a socket-engaging clamp and locking means therefor comprising in combination lates l818' to be locked together, a 100 in screw 20 provided with a head 22, and ange 21, a screw head-guard 24, overlying the flange and head, secured to one of said plates to retain the screw in place and permit rotation thereof, and a screw-threaded shankguard 19, on the other plate for engagement with said screw.

3. In a lamp-locking device, a socket engaging clamp and locking means therefor comprising-1 coactlng duplicate plates, an interiorly t readed screw-receiving socket upon one said plate, opening toward the opposing plate, a cap secured to said oppos ing plate, said cap being of shape to provide a recess between itself and the coactin plate, a bolt screw threaded at one end an angulated at the other, a flange on the bolt In testimony whereof I hereunto set my between szilid sci-e? threaded and angulated hand in the presence of two witnesses.

ortions t ereo or en a ement in the reess between the plate En ca and a rim ALBERT MEYER 5 on the cap for surrounding t e angulated In the presence ofportion of the bolt, substantially as dee Fomn BAIN, scribed. MARY F. ALLEN. 

